Scenery Challenge, camouflage opening

[Charlie B]

A mirror could be used directly behind the 3 tracks to the mine loadout and a short painted backdrop attached to the wall hiding the "portal" Paint it like a mountain and taper it down to nothing. Look up mirror usage , especially John Allen, who was a master. There is a lot of information to be had and you have a good place to use a mirror illusion.    

I am not an artist but I hope this will help you see what I mean. 
Charlie

https://www.google.com/search?q=using+mi...e&ie=UTF-8